摘要
文章讨论了通过改变电子传输层TPBi的厚度,使结构为ITO/Mo O3/NPB/MCP:Firpic/TPBi/Li F/Al的有机电致蓝光器件的效率获得了较大的提高.实验过程中,使Mo O3、NPB、MCP:Firpic层的厚度分别固定在10、40、30 nm不变,改变TPBi的厚度,使TPBi的厚度分别取35、40、45、50、55 nm.研究发现,当TPBi厚度为45 nm时,在不同电流密度的情况下,器件的电流效率均较大,在电流密度较低时,最大电流效率达到16.9 cd/A.这一结果表明了载流子的注入平衡仍是提高器件发光效率的有效手段.
Discussed in the paper by changing the thickness of the electron transport layer TPBi,the blue organic phosphorescent emitting devicee ’s efficiency have been improved markedly using the structure of ITO/MoO3/NPB/MCP:Firpic/TPBi/LiF/Al. The MoO3 ,NPB,MCP:Firpic layer thicknessh were confined at 10 nm,40 nm and 30 nm,respectively,while the thickness of the TPBi were changed. Make the thickness of the TPBi respectively take 35 nm,40 nm,45 nm,50 nm,and 55 nm,it was found that when TPBi thickness was 45 nm, under the condition of the different current density and current efficiency of the device are larger,the current density is lower,the maximum current efficiency is 16. 9 cd/A. The results showed that the carrier injection balance is still the effective way to enhance the efficiency of the device shine.
出处
《吉林师范大学学报(自然科学版)》
2015年第2期14-16,共3页
Journal of Jilin Normal University:Natural Science Edition
基金
国家青年基金项目(10804036)
吉林省科技发展计划项目(20100510
20101512
201215221)
吉林省教育厅"十二五"科研计划项目([2011]第154号
[2012]第175号
[2012]第176号)
吉林师范大学学术型研究生创新科研计划(2013032)
关键词
蓝色有机磷光发光器件
TPBi厚度
电子传输层
blue organic phosphorescent emitting device
thickness of TPBi
electronic transport layer